Javascript error

Hey,
I am having a javascript error on my site https://fightgifs.com with this line of code in footer.php:
var main_menu=new main_menu.dd(“main_menu”);

Uncaught TypeError: Cannot read property ‘dd’ of undefined

Anyone has an idea what to do ? The error is creating a problem for a javascript plugin (Shashin). Whole script:

<script type="text/javascript">

jQuery(document).ready(function($){

$('.carousel').elastislide({

	imageW 	: 145,

	minItems	: 2,

	margin		: 10

});

var main_menu=new main_menu.dd("main_menu");

main_menu.init("main_menu","menuhover");

});

</script>

Thanks a lot !